10 questions on "Microbial Metabolism - Respiration: Electron Carriers"

What is the respiratory chain?
The respiratory chain is the electron transfer system.
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Where does electron transport reactions occur?
In membranes; the cytoplasmic membrane in prokaryotic cells
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Which carriers are included in the participation of electron transport? Name 5.
  1. NADH dehydrogenases
  2. Flavoproteins
  3. Iron-sulfur proteins
  4. Cytochromes
  5. Quinones (nonprotein)
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How are the carriers arranged in the membrane?
In order of increasingly more positive
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Which protein and nonprotein carrier accept 2e- + 2H+, but only donates electrons?
Flavoprotein and quinone (nonprotein)
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Which two carriers do quinones typically link?
Iron-sulfur protein and cytochrome
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Why can quinones move about within the membrane?
Because quinones are small and hydrophobic
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Which molecule does NADH dehydrogenase bind and which molecules does it pass on?
NADH dehydrogenase binds NADH and passes on 2e- + 2H+ to a flavoprotein
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Which carrier contains heme prosthetic groups?
Cytochrome
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Which protein carrier contains prosthetic groups made up of iron and sulfur atoms?
Iron-sulfur protein
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